Interface ActivationMonitor

An ActivationMonitor is specific to an
ActivationGroup and is obtained when a group is
reported active via a call to
ActivationSystem.activeGroup (this is done
internally). An activation group is responsible for informing its
ActivationMonitor when either: its objects become active or
inactive, or the group as a whole becomes inactive.

Method Detail

inactiveObject

An activation group calls its monitor's
inactiveObject method when an object in its group
becomes inactive (deactivates). An activation group discovers
that an object (that it participated in activating) in its VM
is no longer active, via calls to the activation group's
inactiveObject method.

The inactiveObject call informs the
ActivationMonitor that the remote object reference
it holds for the object with the activation identifier,
id, is no longer valid. The monitor considers the
reference associated with id as a stale reference.
Since the reference is considered stale, a subsequent
activate call for the same activation identifier
results in re-activating the remote object.

activeObject

Informs that an object is now active. An ActivationGroup
informs its monitor if an object in its group becomes active by
other means than being activated directly (i.e., the object
is registered and "activated" itself).

inactiveGroup

Informs that the group is now inactive. The group will be
recreated upon a subsequent request to activate an object
within the group. A group becomes inactive when all objects
in the group report that they are inactive.